Mayu's younger sister, a high school student at Kawanuma West and the student council treasurer. She wears glasses, and is more sensible than her air-headed sister. She later becomes the student council president.
(Source: Wikipedia)

Kawanuma West may be a public school, but some of its students are about to get private lessons in sex ed courtesy of four very attractive teachers! To be clear, none of our lady educational professionals begin their semesters by writing “get involved with a fortunate male member of my class” in their daily planners… but strange and inexplicable things keep happening to thrust our teacher/pupil combos into sexually charged situations where something’s bound to happen! Whether it’s falling into water, doors ripping off clothing, or that frequent staple of Japanese school life, the accidental breast/face collision, these poor ladies just can’t help it. And what are the guys supposed to do as they’re pulled deeper and deeper into titillating TILF traps of epic proportions? 
 
(Source: Sentai Filmworks)

[Profile](http://earlywing.co.jp/talent_w/otsuboyuka.php) | [Twitter](https://twitter.com/00tsubo_yuka) | [Spotify](https://open.spotify.com/artist/43ZsqoTPYf5cc4ae3KPVuU?autoplay=true)

Yuka Ootsubo is a Japanese voice actress and singer affiliated with Early Wing. In 2014, she started her career as a singer by joining the band SmileY inc. with Vocaloid musician Yuuyu-P. She also did the voice of Vocaloid character Azuki Masaoka for V4.

__Non-anime roles:__
- Kaalaa Baunaa - Reverse 1999 (VG)

[Twitter](https://twitter.com/mollysearcy)

Teacher...wh-what are you doing here? You're not allowed here, and moreover... Well, yes, I can see that you're having a problem, but you really should... Wait, why are your clothes coming off? Wh-what's happening??? Wait a second... Why the Hell Are You Here, Teacher?! 
(Source: BookWalker) 
Notes: 
- Originally a one-shot series titled "Golden Times." 
- Includes 11 extra chapters.

Saya Matsukaze